Output setting using a DAW for backing track and looping

Here is what I want to do: send QC wet signal from the Grid to my DAW (for looping) via QC USB Out 3&4 and direct monitoring the Grid signal on QC output 3&4 (1/4‘’ TRS connected to my FRFR). The best option for that is the Multi-out selection in output blocks. But this option also send the Grid signal to QC output 1&2 (XLR), what I don’t want.
I want to use QC XLR output 1&2 only for backing track (receiving signal from DAW USB channels 1&2), and for looping, to use QC 1/4’’ TRS output 3&4 (receiving signal from DAW USB channels 3&4). This last one mixed with the Grid signal. Great, all this seems to be done automatically, except for the Grid signal sent to QC output XLR 1&2, what I don’t want.
Is there any option in the output setting of QC where I can turn on/off monitoring Grid signal to XLR (and why not for 1/4’’TRS also) while using multi-out option in the Grid. And how are mixed the USB signals automatically send with the wet signal from the Grid on outputs 1&2 and 3&4. I can’t find any detail in the manual about that or any mixing parameter to adjust output level for matching the wet signal.
Does someone has explored this.